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Freescale MQX Release Notes

Freescale Semiconductor

List of USB class drivers included in the Host Development Kit

‐ Human-interface Class (HID) used to access mouse, keyboard and similar devices.

‐ Mass storage Class used to access USB drives.

‐ USB Hub class used to attach multiple devices to a single host port. If enabled at the

application level, the HUB support is fully transparent. User application only needs to be

modified to be ready to handle multiple USB devices simultaneously. Keyboard/Mouse

example application is provided.

‐ Basic Printer class.

3.6 MQX USB Device

This release of Freescale MQX includes the USB Device drivers and example applications.

Features:

‐ The compile-time configuration of the USB Device Development Kit (DDK) library is now

accomplished by editing the .../config/<board>/user_config.h file.

‐ A new USB Device low-level driver was written for MCF5222x and MCF5225x devices. This

new driver does not imply any change to higher levels of the USB Device applications.

‐ Similarly as the PSP, the DDK library is now configured and built for specific board.

‐ The USB Device communication stack implements a generic API and does not contain any

specific class drivers. The class support is implemented at the application level. This concept

is subject to change in future versions.

‐ The following standard class example applications are provided:

o HID (mouse emulation)

o Mass Storage (internal RAM area accessed as mass storage)

3.7 MQX Shell

The shell and command-line handling code was moved from RTCS into a separate library called

Shell. Similarly as other components, the shell is configured and built for specific board.

3.8 Compile-time Configuration

One of the major changes when comparing the Freescale release with the original ARC release is

the approach to compile-time configuration of kernel and other core components. All compile-time

configuration options were centralized into a single user configuration file located in

<install_dir>/config/<board>/user_config.h

This user configuration file is included internally by private configuration files in MQX PSP and BSP.

To share configuration settings between different boards, the user_config.h may include other

header files with common settings. The header files may only be located in the same <board>

directory or in the common directory:

<install_dir>/config/common

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